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Determination of thorium and uranium at the nanogram per gram level in semiconductor potting plastics by neutron activation analysis

Description: A method was developed to determine thorium and uranium in semiconductor potting plastics. The method is based on neutron activation and subsequent radiochemical separation to isolate and permit measurement of the induced /sup 233/Pa and /sup 239/Np. These plastics typically contain macro amounts of silicon, bromine and antimony and nanogram per gram amounts of thorium and uranium. The radiochemical method provides the necessary sensitivity and makes it possible to easily attain adequate decont… more
Date: January 1, 1985
Creator: Dyer, F.F.; Emery, J.F. & Bate, L.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Beam characterization at the Neutron Radiography Facility (NRAD)

Description: An ongoing project to characterize the neutron beams at the Neutron Radiography Reactor (NRAD) is described in this paper. The effort has consisted of computer modelling with three dimensional diffusion theory to obtain a trail spectrum, foil activation measurements, and the use of SAND-II unfolding code. It was expected and found that diffusion theory will underpredict the fast flux. However, it is claimed that precise characterization of the entire spectrum is not necessary for comparisons am… more
Date: January 1, 1992
Creator: Imel, G.R. & Urbatsch, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of Vanadium in Milk Powder by Neutron Activation Analysis Using a Rapid Radiochemical Separation of 3.77-Minute Vanadium-52

Description: A procedure is described for the activation determination of V in powdered milk using 3.77-min V/sup 52/. The quantity of V in the sample is obtained by comparing the V/sup 52/ radioactivity found in the test sample with the V/sup 52/ radioactivity in a V comparator sample that is treated in the same manner as the test sample. The procedure can also be used for the determination of V in a variety of materials. (P.C.H.)
Date: November 15, 1963
Creator: Molinski, V. J.; Wahl, W. H. & Strain, W. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analyses of fine paste ceramics

Description: Four chapters are included: history of Brookhaven fine paste ceramics project, chemical and mathematical procedures employed in Mayan fine paste ceramics project, and compositional and archaeological perspectives on the Mayan fine paste ceramics. (DLC)
Date: January 1, 1980
Creator: Sabloff, J A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electron accelerator based system for assay of transuranic waste barrels

Description: A complete assay system for 208-liter barrels contianing transuranic wastes has been developed. The system consists of an 8-MeV commercial electron accelerator, neutron moderating cavity housing the waste barrel and containing neutron detectors, high resolution germanium gamma spectrometer, and x-ray radiography camera (both film and real time). The electron linac is used to produce bremsstrahlung and high-intensity pulsed neutron flux, both of which are used to interrogate the fissionable mate… more
Date: January 1, 1984
Creator: Kocimski, S. M.; Franks, L. A.; Caldwell, J. T.; Close, D. A.; Kunz, W. E.; Morgado, R. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Consistent set of nuclear parameters values for absolute INAA

Description: Gamma spectral analysis of irradiated material can be used to determine absolute disintegration rates for specific radionuclides. These data, together with measured values for the thermal and epithermal neutron fluxes, and irradiation, cooling and counting time values, are all the experimental information required to do absolute Instrumental Neutron Activation Analysis. The calculations required to go from product photon emission rate to target nuclide amount depend upon values used for the the… more
Date: January 1, 1980
Creator: Heft, R.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Uranium hydrogeochemical and stream sediment reconnasissance of the Trinidad NTMS Quadrangle, Colorado, including concentrations of forty-two additional elements

Description: Uranium and other elemental data resulting from the Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) of the Trinidad National Topographic Map Series (NTMS) quadrangle, Colorado, by the Los Alamos Scientific Laboratory (LASL) are reported herein. This study was conducted as part of the United States Department of Energy's National Uranium Resource Evaluation (NURE), which is designed to provide improved estimates of the availability and economics of nuclear fuel resources and to make a… more
Date: May 1, 1980
Creator: Shannon, S.S. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Petrology, geochronology, and chemical evolution of the Twin Peaks Rhyolite Domes, Utah

Description: Two distinct sequences of silicic volcanism at the Twin Peaks volcanic field, Millard County, Utah, spanned periods from 2.74 +- .10 to 2.54 +- .09 m.y. and 2.43 +- .08 to 2.35 +- .08 m.y., and produced a total exposed volume of 4 km/sup 3/ of rhyolites and volcanoclastics. Wet chemical, x-ray fluorescence, microprobe, atomic absorption, and neutron activation methods have been employed to obtain a wide range of chemical data on whole rock and mineral separate samples. Calculated distribution c… more
Date: May 1, 1980
Creator: Crecraft, H. R.; Nash, W. P. & Evans, S. H., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Samanid ceramics and neutron activation analysis

Description: Glazed pottery known as ''Afrasiyab'' and ''Nishapur'' wares (early Islamic ceramics) are generally attributed to the Samanid dynasty (819-1005). The clay composition of Samanid wares and discarded kiln items found in situ were analyzed by NAA and the elemental composition compared with that of other sherds. 7 figures, 1 table. (DLC)
Date: August 29, 1977
Creator: Azarpay, G.; Frierman, J.D. & Asaro, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radiochemistry of uranium

Description: This volume which deals with the radiochemistry of uranium is one of a series of monographs on radiochemistry of the elements. There is included a review of the nuclear and chemical features of particular interest to the radiochemist, a discussion of problems of dissolution of a sample and counting technique, and finally, a collection of radiochemical procedures for the element as found in the literature.
Date: March 1, 1962
Creator: Gindler, J.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Grand Canyon 1/sup 0/ x 2/sup 0/ NTMS area: Arizona. Data report

Description: This data report presents results of ground water and stream/surface sediment reconnaissance in the National Topographic Map Series (NTMS) Grand Canyon 1/sup 0/ x 2/sup 0/ quadrangle. Surface samples (sediment) were collected from 1013 sites. The target sampling density was one site per 16 square kilometers (six square miles). Ground water samples were collected at 84 sites. Neutron activation analysis (NAA) results are given for uranium and 16 other elements in sediments, and for uranium and 9… more
Date: January 1, 1979
Creator: Koller, G R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ritzville 1/sup 0/ x 2/sup 0/ NTMS area, Washington: data report

Description: This data report presents results of ground water and stream/surface sediment reconnaissance in the National Topographic Map Series (NTMS) Ritzville 1/sup 0/ x 2/sup 0/ quadrangle. Surface samples (sediment) were collected from 1063 sites. The target sampling density was one site per 20 square kilometers (eight square miles). Dry conditions contributed to the relatively small number (109) of surface water samples collected. Ground water samples were collected at 830 sites. Neutron activation an… more
Date: July 1, 1980
Creator: Bennett, C.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A GENERALIZED PROCEDURE FOR THE ISOLATION OF IODINE WITHOUT CARRIER--ITS DETERMINATION BY NEUTRON ACTIVATION USING I$sup 129$ AS AN ISOTOPIC TRACER

Description: In order to make the 1.7 x 10/sup 7/-year I/sup 129/ useful as an iodine tracer, a neutron-activation procedure was used for its determination. A procedure involving high-temperature ignition in a stream of oxygen was devised for the isolation of iodine from a variety of materials. After activation and decontamination, a large sodium iodide, well-type crystal was used as a selective detector for the I/sup 130/ activation product. The normal iodine content of a sample is readily determined at th… more
Date: July 1, 1962
Creator: Studier, M.H.; Postmus, C. Jr.; Mech, J.; Walters, R.R. & Sloth, E.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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McDermitt 1/sup 0/ x 2/sup 0/ NTMS area, Nevada. Data report (abbreviated)

Description: Surface sediment samples were collected at 1337 sites, at a target sampling density of one site per 13 square kilometers. Ground water samples were collected at 255 sites and surface water samples were collected at 41 sites. Neutron activation analysis results are given for uranium and 16 other elements in sediments, and for uranium and 9 other elements in ground water and surface water. Mass spectrometry results are given for helium in ground water. Field measurements and observations are repo… more
Date: July 1, 1980
Creator: Thayer, P. A. & Cook, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Biological fate of cobalt-60 released during the corrosion of neutron-activated stanless steel in seawater

Description: Passing seawater over radioactive Type 347 stainless steel in a sediment/seawater laboratory system and exposing marine animals to this environment provided information on the bioaccumulation of /sup 60/Co from radioactive structural material. Exposure of marine organisms to radioactive corrosion products and directly to radioactive stainless steel in seawater simulated some of the possible conditions which could arise from the deposition of radioactive stainless steel on the ocean floor. Detec… more
Date: March 1, 1982
Creator: Young, J. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solvent Refined Coal (SRC) process: trace elements. Research and development report No. 53, interim report No. 31, August 1976-July 1977. Volume III. Pilot plant development work. Part 6. [Fate of 36 trace elements]

Description: Results are presented on a study of the distribution and fate of 34 trace elements in the Solvent Refined Coal Process at the pilot plant located at Fort Lewis, Washington, and operated by The Pittsburg and Midway Coal Mining Co. under contract with the US Department of Energy. Neutron activation analysis was used to determine Ti, V, Ca, Mg, Al, Cl, Mn, As, Sb, Se, Hg, Br, Co, Ni, Cr, Fe, Na, Rb, Cs, K, Sc, Tb, Eu, Sm, Ce, La, Sr, Ba, Th, Hf, Ta, Ga, Zr, and Cu in feed coals, process solvent, S… more
Date: March 1, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pocatello 1/sup 0/ x 2/sup 0/ NTMS area Idaho. Data report: National Uranium Resource Evaluation program, hydrogeochemical and stream sediment reconnaissance

Description: This data report presents results of groundwater and stream/surface sediment reconnaissance in the National Topographic Map Series (NTMS) Pocatello 1/sup 0/ x 2/sup 0/ quadrangle. Surface samples (sediment) were collected from 1701 sites. The target sampling density was one site per 16 square kilometers (six square miles). Ground water samples were collected at 381 sites. Neutron activation analysis (NAA) results are given for uranium and 16 other elements in sediments, and for uranium and 9 ot… more
Date: July 1, 1980
Creator: Cook, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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NON-DESTRUCTIVE ANALYSIS OF URANIUM IN GRAPHITE FUEL ELEMENTS BY NEUTRON ACTIVATION

Description: A method is presented for the determination of uranium (as U/sup 238/) in uraniuni-loaded graphite fuel elenients by a non-destructive, direct radioactivity analysis technique. A 200-cbannel pulse-height analyzer, equipped with a 3 in. x 3 in. NaI(Tl) crystal, is used to measure the Np/sup 239/ radioactivity of the neutron-irradiated samples. The amount of U/sup 238/ in the test samples is deterimined quantitatively by comparing the Np/sup 239/ radioactivity induced in each sample with the Np/s… more
Date: November 28, 1961
Creator: Bate, L.C.; Hampton, W.J. & Leddicotte, G.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fate of corrosion products released from stainless steel in marine sediments and seawater. Part 2. Sequim Bay clayey silt

Description: This report describes laboratory experiments in which neutron-activated 347 stainless steel specimens were exposed to clayey silt from Sequim Bay, Washington. The properties and trace metal geochemistry of the sediment and the amounts of corrosion products that were released under oxic and reduced conditions and their distribution among different chemical fractions of the sediment are discussed. The distributions of Cr, Mn, Fe, Ni and Cu among different chemical forms in the Sequim Bay sediment… more
Date: April 1, 1982
Creator: Schmidt, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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In Vivo Measurement of Cadmium in an Occupationally-Exposed Population

Description: Exposure to cadmium is recognized as a potentially serious health problem. A number of clinical abnormalities have been observed in workers occupationally exposed to cadmium. Therefore, it is essential that accurate data on body burdens be available in order to formulate dose-response relationships in man. The present Brookhaven facility for in vivo measurements of cadmium in man is described, and recent results from a field study to a cadmium production plant are reported. The cadmium content … more
Date: 1980~
Creator: Ellis, K. J.; Morgan, W. D.; Yasumura, S.; Vartsky, D.; Zanzi, I. & Cohn, S. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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(Relative mobilities and transport mechanisms of trace elements during contact metamorphism of carbonate rocks). Progress report

Description: The main objective of this study is to investigate the relative mobilities and transport mechanisms of major, minor, and trace elements during the contact metamorphism of carbonate rocks. The large contrasts in chemical potentials of SiO/sub 2/, Al/sub 2/O/sub 3/, and CaO across a granitic pluton-limestone contact may induce metasomatism. In addition, rare earth and transition metal elements may act as tracers, and their redistribution during metamorphism may record convective cooling processes… more
Date: unknown
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Absolute instrumental neutron activation analysis at Lawrence Livermore Laboratory

Description: The Environmental Science Division at Lawrence Livermore Laboratory has in use a system of absolute Instrumental Neutron Activation Analysis (INAA). Basically, absolute INAA is dependent upon the absolute measurement of the disintegration rates of the nuclides produced by neutron capture. From such disintegration rate data, the amount of the target element present in the irradiated sample is calculated by dividing the observed disintegration rate for each nuclide by the expected value for the d… more
Date: December 21, 1977
Creator: Heft, R.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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